2455 Old Penitentiary Road

Boise, ID 83712 (Next to the Old Pen)

Current Hours

Currently closed for the winter. Re-opening has not been scheduled. Stay tuned!

Free Admission!

Tours and other programs available.

About Us

Mission of IMMG is to promote education and understanding of the importance of mining & geologic sciences to the development of Idaho. The Museum will access, develop, and maintain exhibits, collections, and activities pertaining to mining & geology in the Idaho region. IMMG will maintain geologic expertise, knowledge of the mining industry in the State, and a vigorous set of education & outreach programs to citizens & visitors of Idaho.

  • 2455 Old Penitentiary Road
    Boise, ID 83712
  • 208-368-9876
  • Noon - 5pm
    Wednesday - Sunday
  • OPEN Seasonally

Our History

The Idaho Museum of Mining and Geology (IMMG) was founded as a non-profit in 1989 and opened in the Trusty Dorm at the Old Idaho State Penitentiary in 1994. Since then, we have shared Idaho mining stories and given visitors a peek into the fascinating study of earth sciences with an emphasis on Idaho geology. The museum includes a historic mining camp, lode and placer mining equipment, a microscope station, rocks and minerals from Idaho, fluorescent minerals, meteorites, fossils, and a seismograph!